Alex&Kim

Yes GUZ sends you a list of documents  you return them and they allow you schedule your appointment.  
 
The GUZ P3 is what prevents people in China from getting a head start, they want the instructions page mailed back with the requested documents.
 
http://www.ustraveldocs.com/cn/cn-iv-visaapplyinfo.asp#KVisaPetitions
 
P3 Letter for China:
https://drive.google.com/file/d/1gcrLW0OCkGfdz43tehWNmgDayJUrRTdj/view?usp=sharing
 
U.S. Consulate General Guangzhou when it is time to schedule an interview. K visa applicants will be notified by the U.S. Consulate General Guangzhou when it is time to schedule an interview. You cannot schedule your interview appointment till such time as you have been sent the P3 letter from the Embassy and have returned the requested documents. 
 
Here is some help from other members here on VJ:
http://www.visajourney.com/forums/forum/94-china/
 
And the Portal here on VJ for processing in China and what to expect
http://www.visajourney.com/consulates/index.php?ctry=China&cty=Guangzhou
 
and the http://www.ustraveldocs.com/cn/cn-iv-visaapplyinfo.asp
 
Don't waste time while you're waiting for P3, complete DS-160 and print confirmation page. Since you are from China go to the 2nd link below and click immigrant to register under K1 visa. After you register and enter info it should be clear on how to pay fee, make sure you print bank deposit slip. Just follow directions under Nonimmigrant Visa, but make sure when you register K1 is under Immigrant Visa. 
 
Directions go to http://www.ustraveldocs.com/cn/cn-niv-visaapply.asp 
 
Register(Create Account) https://cgifederal.secure.force.com/?language=English&country=China 
 
After you register make sure to choose K1 visa under Immigrant, it wasn't an option for under non-immigrant. 
 

Congrats on your interview date btw. Everything is moving smoothly for you!

Noa2 has arrived via email.  We are with an agency.
Happy Dance Time !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I called several times last week to ask for case status and every time was told that they hadn't touched my case yet.
 
Today I received the approval letter! 
 
NOA1 - 11/15
NOA2 - 3/21
 
Neither site was updated. 

I learned a new trick!!  ⬇️ 

Thank you!! ❤️
 
Maybe they like to mess with us on purpose lol.  They can probably smell our desperation. hehehe. 

Thank you! Hope your NOA2 letter is on the way!

Thank you!! I hope you will join the approved ones very soon. 
 
So far I had three level 2 officers telling me the case hadn't been touched and one level 2 officer telling me they were close to making a decision. All conversations happened AFTER the case was actually approved.   Definitely don't get yourself upset when hearing similar things but knowing there was no RFE is a good thing. 

I called several times last week to ask for case status and every time was told that they hadn't touched my case yet.
 
Today I received the approval letter! 
 
NOA1 - 11/15
NOA2 - 3/21
 
Neither site was updated. 

Really depends on who you talk to, but be prepared to hear the usual line such as " you are within the normal processing time" for most of the time. 
 
From my experience, neither level 1 or 2 representatives were able to tell me anything regarding background check. Since your NOA1 is 11/27, you are still in a very early stage IMO.